Martin Luther King, Jr. delivers his famous speech on the steps of the Lincoln Memorial in Washington on August 28, 1963. King told the crowd of 200,000 people, "I have a dream that this nation will rise up and live out the true meaning of its creed, 'We hold these truths to be self evident: that all men are created equal'."

Martin Luther King, Jr. delivers his famous speech on the steps of the Lincoln Memorial in Washington on August 28, 1963. King told the crowd of 200,000 people, "I have a dream that this nation will rise up

Dr. Martin Luther King, Jr. displays his 1964 Nobel Peace Prize medal in Oslo, Norway, December 10, 1964. The 35-year-old Dr. King was honored for promoting the principle of non-violence in the civil rights movement. (AP Photo) less

Dr. Martin Luther King, Jr. displays his 1964 Nobel Peace Prize medal in Oslo, Norway, December 10, 1964. The 35-year-old Dr. King was honored for promoting the principle of non-violence in the civil rights ... more

The Rev. Martin Luther King Jr. stands with other civil rights leaders on the balcony of the Lorraine Motel in Memphis, Tenn., April 3, 1968, a day before he was assassinated at approximately the same place. From left, are Hosea Williams, Jesse Jackson, King, and Ralph Abernathy. The 39-year-old Nobel Laureate was the father of non-violence in the 1960s civil rights movement. (AP Photo) less

The Rev. Martin Luther King Jr. stands with other civil rights leaders on the balcony of the Lorraine Motel in Memphis, Tenn., April 3, 1968, a day before he was assassinated at approximately the same place. ... more

James Earl Ray walks to his chair at the House Assassinations Committee August 16, 1978 in Washington. The panel is probing the slaying of Dr. Martin Luther King for which Ray is serving a 99 year sentence at a Tennessee prison. Ray pleaded guilty in Memphis, Tennessee on March 10, 1969, to the assassination of Martin Luther King Jr. less

James Earl Ray walks to his chair at the House Assassinations Committee August 16, 1978 in Washington. The panel is probing the slaying of Dr. Martin Luther King for which Ray is serving a 99 year sentence at ... more

Photo: ASSOCIATED PRESS

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TODAY IN HISTORY/WED 03 21 01/MLK SELMA MARCH - Martin Luther King is shown leading a civil rights march in Selma, Alabama, March 21, 1965. More than 3,000 civil rights demonstrators led by the Rev. Martin Luther King Jr. began their march from Selma to Montgomery, Alabama. In front of King is Rev. Andrew Young, who later became United Nations ambassador. Marching with King from left: James Farmer, Bishop Lord, King and James Forman. Behind King is Rev. Ralph Abernathy. CREDIT: ASSOCIATED PRESS
SOURCE: EXPRESS-NEWS FILE PHOTO less

TODAY IN HISTORY/WED 03 21 01/MLK SELMA MARCH - Martin Luther King is shown leading a civil rights march in Selma, Alabama, March 21, 1965. More than 3,000 civil rights demonstrators led by the Rev. Martin ... more

Aides to Martin Luther King point to the area from where they heard the shot that killed King, lying on balcony, in Memphis, Tenn. April 4, 1968. This photo was released by Life magazine, which obtained it from photographer Joseph Louw, a TV producer who was in a motel room two doors from King's when he heard the shot. less

Aides to Martin Luther King point to the area from where they heard the shot that killed King, lying on balcony, in Memphis, Tenn. April 4, 1968. This photo was released by Life magazine, which obtained it ... more

Photo: TIME INC.

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San Antonio's annual march honoring the late Martin Luther King Jr. began 15 years ago, five years before Texas designated a day specifically to honor the inspirational civil rights leader.
FILE - Then and Now - 01/20 - Ricky Johnson ( with picture ) and other MLK marchers listen to the Greater Lincoln Park Temple Choir during the MLK Freedom March program Jan. 15 , 1990. San Antonio Express-News File photo byKevin Geil less

San Antonio's annual march honoring the late Martin Luther King Jr. began 15 years ago, five years before Texas designated a day specifically to honor the inspirational civil rights leader.
FILE - Then and ... more

Photo: KEVIN GEIL, FILE

San Antonio's annual march honoring the late Martin Luther... Photo-517091.2561 - StamfordAdvocate

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President Lyndon B. Johnson reaches to shake hands with Dr. Martin Luther King Jr. after presenting the civil rights leader with one of the 72 pens used to sign the Civil Rights Act of 1964 in Washington, D.C., on July 2, 1964. President Johnson asked for civil rights leader public support of his policies on Vietnam in tape recorded conversations released Friday, April 12, 2002, by Johnson's presidential library in Austin, Texas. (AP Photo) less

President Lyndon B. Johnson reaches to shake hands with Dr. Martin Luther King Jr. after presenting the civil rights leader with one of the 72 pens used to sign the Civil Rights Act of 1964 in Washington, D.C., ... more

Dr. Martin Luther King Jr., head of the Southern Christian Leadership Conference, addresses marchers during his "I Have a Dream" speech at the Lincoln Memorial in Washington D.C. Aug. 28, 1963. (AP Photo)

Dr. Martin Luther King Jr., head of the Southern Christian Leadership Conference, addresses marchers during his "I Have a Dream" speech at the Lincoln Memorial in Washington D.C. Aug. 28, 1963. (AP Photo)

Photo: AP

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Rev. Martin Luther King, Jr., is pictured at an integration rally in Montgomery, Ala. in this May 21, 1961 file photo.

Rev. Martin Luther King, Jr., is pictured at an integration rally in Montgomery, Ala. in this May 21, 1961 file photo.

The Rev. Martin Luther King Jr. acknowledges the crowd at the Lincoln Memorial for his "I Have a Dream" speech during the March on Washington, D.C., oin this Aug. 28, 1963, file photo. The march was organized to support proposed civil rights legislation and end segregation. King founded the Southern Christian Leadership Conference in 1957, advocating nonviolent action against America's racial inequality. He was awarded the Nobel Peace Prize in 1964, and was assassinated in Memphis, Tenn., in April 1968. (AP Photo) less

The Rev. Martin Luther King Jr. acknowledges the crowd at the Lincoln Memorial for his "I Have a Dream" speech during the March on Washington, D.C., oin this Aug. 28, 1963, file photo. The march was organized ... more

Dr. Martin Luther King Jr. and his wife, Coretta Scott King, sit with three of their four children in their Atlanta, Ga, home, in this March 17, 1963 file photo. From left are: Martin Luther King III, 5, Dexter Scott, 2, and Yolanda Denise, 7. Coretta Scott King, who turned a life shattered by her husband's assassination into one devoted to enshrining his legacy of human rights and equality, has died, former mayor Andrew Young told NBC Tuesday morning, Jan. 31, 2006. She was 78. (AP Photo) less

Dr. Martin Luther King Jr. and his wife, Coretta Scott King, sit with three of their four children in their Atlanta, Ga, home, in this March 17, 1963 file photo. From left are: Martin Luther King III, 5, ... more

Dr. Martin Luther King, Jr., left, and his wife, Coretta Scott King, second from left, join pickets during a tour of an Atlanta slum area, in this Feb. 1, 1966 file photo. The two women carrying signs were protesting the arrest of Hector Black, a volunteer who was charged with trespassing while handing out blankets at an apartment in the area. Coretta Scott King, who turned a life shattered by her husband's assassination into one devoted to enshrining his legacy of human rights and equality, has died, former mayor Andrew Young told NBC Tuesday morning, Jan. 31, 2006. She was 78. (AP Photo) less

Dr. Martin Luther King, Jr., left, and his wife, Coretta Scott King, second from left, join pickets during a tour of an Atlanta slum area, in this Feb. 1, 1966 file photo. The two women carrying signs were ... more

The family of Dr. Martin Luther King, Jr. walk in the funeral procession of the slain civil rights leader, in Atlanta, in this April 9, 1968 file photo. From left: daughter Yolanda, 12; King's brother A.D. King; daughter Bernice, 5; widow Coretta Scott King; Rev. Ralph Abernathy; sons Dexter, 7, and Martin Luther King III, 10. Coretta Scott King, who turned a life shattered by her husband's assassination into one devoted to enshrining his legacy of human rights and equality, has died, former mayor Andrew Young told NBC Tuesday morning, Jan. 21, 2006. She was 78. less

The family of Dr. Martin Luther King, Jr. walk in the funeral procession of the slain civil rights leader, in Atlanta, in this April 9, 1968 file photo. From left: daughter Yolanda, 12; King's brother A.D. ... more

Photo: AP

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Dr. Martin Luther King, Jr., is embraced by his wife Coretta Scott King during a news conference at Harlem Hospital in New York, in this Sept. 30, 1958 file photo, where he was recovering from a stab wound following an attack by a woman. At left is his mother, Alberta Williams King. Scott King, who turned a life shattered by her husband's assassination into one devoted to enshrining his legacy of human rights and equality, has died, former mayor Andrew Young told NBC Tuesday, morning, Jan. 31, 2006. She was 78. less

Dr. Martin Luther King, Jr., is embraced by his wife Coretta Scott King during a news conference at Harlem Hospital in New York, in this Sept. 30, 1958 file photo, where he was recovering from a stab wound ... more

Civil rights marchers cross the Alabama river on the Edmund Pettus Bridge at Selma March 21, 1965, with Dr. Martin Luther King Jr. at the lead at the start of a five day, 50-mile march to the State Capitol of Montgomery for voter registration rights for blacks. The two leading Democratic candidates for the 2008 presidential nomination, Sen. Hillary Rodham Clinton, D-N.Y. and Sen. Barack Obama, D-Ill., are scheduled to give nearly simultaneous speeches behind church pulpits just half a block apart from each other in Selma, Ala., on Sunday, March 4, 2007, to commemorate the 42nd anniversary of the bloody civil rights march there that helped rollback segregation in the South. less

Civil rights marchers cross the Alabama river on the Edmund Pettus Bridge at Selma March 21, 1965, with Dr. Martin Luther King Jr. at the lead at the start of a five day, 50-mile march to the State Capitol of ... more

Yolanda Denise King, daughter of Civil Rights leader Martin Luther King, watches from the podium at left, as her father gestures during a speech at a political rally in Montgomery, Ala., April 29, 1966. King, daughter and eldest child of civil rights leader the Rev. Martin Luther King Jr., has died, said Steve Klein, a spokesman for the King Center. King died late Tuesday May 15, 2007 in Santa Monica, Calif., at age 51. less

Yolanda Denise King, daughter of Civil Rights leader Martin Luther King, watches from the podium at left, as her father gestures during a speech at a political rally in Montgomery, Ala., April 29, 1966. King, ... more

Demonstrators, including Dr. Martin Luther King, Jr., stream over an Alabama River bridge at the city limits of Selma, Ala., in this March 10, 1965 file photo, during a voter rights march. (AP Photo, File)

Demonstrators, including Dr. Martin Luther King, Jr., stream over an Alabama River bridge at the city limits of Selma, Ala., in this March 10, 1965 file photo, during a voter rights march. (AP Photo, File)

In this June 5, 2968 file photo, Presidential candidate Sen. Robert F. Kennedy speaks to campaign workers in Los Angeles minutes before he was shot June 5, 1968. At his side are his wife, Ethel, and his California campaign manager, Jesse Unruh, speaker of the California Assembly. As Presidential hopeful Sen. Barack Obama, D-Ill., moves ever closer to becoming America's first black president many worry about his safety. Supporters who see Obama as an inspiring, youthful advocate of change in the mold of Kennedy are mindful of Kennedy's assassination just two months after the Rev. Martin Luther King Jr. was killed. less

In this June 5, 2968 file photo, Presidential candidate Sen. Robert F. Kennedy speaks to campaign workers in Los Angeles minutes before he was shot June 5, 1968. At his side are his wife, Ethel, and his ... more

This April 1968 photo released by the MLK Jr. National Historic Site, Martin Luther King Jr.s body is carried to Morehouse College in Atlanta, on a mule-drawn wagon accompanied by his aides dressed in denim attire. The wagon, mules and denim clothes symbolized the Poor Peoples Campaign. The photograph is part of the exhibition "From Memphis to Atlanta: The Drum Major Returns Home" at Atlanta's Martin Luther King, Jr. National Historic Site April 4-August 31, 2008. less

This April 1968 photo released by the MLK Jr. National Historic Site, Martin Luther King Jr.s body is carried to Morehouse College in Atlanta, on a mule-drawn wagon accompanied by his aides dressed in denim ... more

Photo: Bob Adelman, AP

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Dr. Martin Luther King Jr. is seen at a press conference in 1966. (AP Photo)

Dr. Martin Luther King Jr. is seen at a press conference in 1966. (AP Photo)

Photo: AP

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San Antonio's annual march honoring the late Martin Luther King Jr. began 15 years ago, five years before Texas designated a day specifically to honor the inspirational civil rights leader.
FILE- Then & Now- 0120 - First Martin Luther King march in San Antonio on Jan 19, 1987. less

San Antonio's annual march honoring the late Martin Luther King Jr. began 15 years ago, five years before Texas designated a day specifically to honor the inspirational civil rights leader.
FILE- Then & Now- ... more

Photo: PAT SULLIVAN, FILE

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Dr. Martin Luther King speaks March 25, 1967 at the Chicago peace march.

Dr. Martin Luther King speaks March 25, 1967 at the Chicago peace march.

This 1978 file photo shows Rev. R.A. Callies accepting a donation, using one of the red coffee cans he and children carried at street corners while raising money for a statue of Martin Luther King Jr. EXPRES-NEWS FILE PHOTO less

This 1978 file photo shows Rev. R.A. Callies accepting a donation, using one of the red coffee cans he and children carried at street corners while raising money for a statue of Martin Luther King Jr. ... more

Martin Luther King Jr., second right, and SCLC aides Hosea Williams, Jesse Jackson Jr., from left, and Ralph Abernathy return to the Lorraine Motel in Memphis to strategize for the second Sanitation Workers march led by King in this April 3, 1968 file photo. King was shot dead on the balcony April 4, 1968. The photograph is part of the exhibition "From Memphis to Atlanta: The Drum Major Returns Home" at Atlanta's Martin Luther King, Jr. National Historic Site April 4-August 31, 2008. less

Martin Luther King Jr., second right, and SCLC aides Hosea Williams, Jesse Jackson Jr., from left, and Ralph Abernathy return to the Lorraine Motel in Memphis to strategize for the second Sanitation Workers ... more